2003 HONDA CIVIC HATCHBACK radiator

If necessary, f ill the reserve tank
to the MAX mark. Install the
reserve tank cap.
Install the radiator cap, and
tighten it fully.
Start the engine and hold it at
1,500 rpm until the radiator f an
comes on. Turn of f the engine.
Check the coolant level in the
radiator and add coolant if needed.
Remove the radiator cap. Fill the
radiator with coolant up to the
base of the f iller neck.
Start the engine and let it run until
the radiator fan comes on two
times. Then stop the engine.
Pour Honda All Season
Antif reeze/Coolant Type 2 into
the radiator up to the base of the
f iller neck. This coolant is a
mixture of 50 percent antif reeze
and 50 percent water. Pre-mixing
is not required.
The cooling system capacity is: Install the radiator cap, and
tighten it to the first stop.
Fill the reserve tank to the MAX
mark. Install the reserve tank cap.
Check the level in the radiator,
add coolant if needed.
Start the engine and let it run f or
about 30 seconds. Then turn of f
the engine.
10. 19.
18.
17.
16.
15.
11. 12. 13.14.
Cooling Syst em
Maint enance 175
RESERVE TANK
Fill up to here
1.32 US gal (5.0
)

Periodically check the engine’s
radiator and air conditioning
condenser f or leaves, insects, and
dirt stuck to the f ront surf ace. These
block the air f low and reduce cooling
ef f iciency. Use a light spray f rom a
hose or a sof t brush to remove them.If the air conditioning does not get as
cold as before, have your dealer
check the system. Recharge the
system with Ref rigerant HFC-134a
(R-134a). (See Specif ications on page
.)
Run the air conditioning at least once
a week during the cold weather
months. Run it f or at least ten
minutes while you are driving at a
steady speed with the engine at
normal operating temperature. This
circulates the lubricating oil con-
tained in the ref rigerant.
Your car’s air conditioning is a sealed
system. Any major maintenance,
such as recharging, should be done
by a qualif ied mechanic. You can do
a couple of things to make sure the
air conditioning works ef f iciently.
251
A ir Condit ioning Syst em
Maint enance189
AIR CONDITIONING
CONDENSER
Whenever you have the air conditioning
system serviced, make sure the service
f acility uses a ref rigerant recycling
system. This system captures the
ref rigerant f or reuse. Releasing
ref rigerant into the atmosphere can
damage the environment.
The condenser and radiator f ins bend
easily. Only use a low-pressure spray
or sof t-bristle brush to clean them.

If the temperature gauge stays at
the red mark, turn of f the engine.
Wait until you see no more signs
of steam or spray, then open thehood.
If you don’t f ind an obvious leak,
check the coolant level in the
radiator reserve tank (see page). If the level is below the
MIN mark, add coolant to halfway
between the MIN and MAX marks. If the temperature stays normal,
check the coolant level in the
radiator reserve tank. If it has
gone down, add coolant to the
MAX mark. Put the cap back on
tightly.
If there was no coolant in the
reserve tank, you may also have to
add coolant to the radiator. Let the
engine cool down until the pointer reaches the middle of the tempera-
ture gauge, or lower, bef ore check-
ing the radiator.
Using gloves or a large heavy
cloth, turn the radiator cap
counterclockwise, without pushing
down, to the f irst stop. This
releases any remaining pressure in
the cooling system. After the
pressure releases, push down on
the cap and turn it until it comes
off.
Start the engine and set the
temperature control dial to
maximum. Add coolant to the
radiator up to the base of the f iller
neck. If you do not have the
proper coolant mixture available,
you can add plain water.
Remember to have the cooling
system drained and ref illed with
the proper mixture as soon as you
can.
Look f or any obvious coolant leaks,
such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you f ind a leak, it
must be repaired bef ore you
continue driving (see
on page ). Put the radiator cap back on
tightly. Run the engine and watch
the temperature gauge. If it goes
back to the red mark, the engine
needs repair. (See
on page .)
4. 5.
6. 7. 8. 9.10.
11.
12.
133 245
245
Emergency
Towing
Emergency
Towing
If Your Engine Overheats
T aking Care of t he Unexpect ed 233
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.

...
Octane Requirement, Gasoline . 128
.........................................
Odometer . 63
...............................
Odometer, Trip . 63
Oil
........................
Change, How to . 169
......................
Change, When to . 158
......................
Checking Engine . 132
..............
Pressure Indicator . 58, 234
...........
ON (Ignition Key Position) . 73
Onboard Ref ueling Vapor
....................................
Recovery . 256
.........................
Opening the Hatch . 80
........................
Opening the Hood . 130
..
Operation in Foreign Countries . 255
..............................
Outside Mirrors . 88
....................
Overheating, Engine . 232
.......
Owner Maintenance Checks . 165
.........................
Oxygenated Fuels . 254
..............................
Paint Touch-up . 216
..............
Panel Brightness Control . 67
...........................................
Parking . 146 .................................
Parking Brake . 89
Parking Brake and Brake
.................
System Indicator . 59, 238
.................................
Parking Lights . 66
..
Parking Over Things that Burn . 258
.............................
PGM-FI System . 257
..................
Polishing and Waxing . 215
..............................
Power Windows . 85
............
Pre-Drive Saf ety Checklist . 11
.........
Pregnancy, Using Seat Belts . 18
............................
Protecting Adults . 12
...
Additional Safety Precautions . 18
.....
Advice f or Pregnant Women . 18
........................
Protecting Children . 20
.......................
Protecting Inf ants . 29
.......
Protecting Larger Children . 35
.........
Protecting Small Children . 32
Using Child Seats with
.....................................
Tethers . 39
...................
Radiator Overheating . 232
...
Radio/Cassette Sound System . 104
..........................
Rear End Towing . 245
..
Rear Lights, Bulb Replacement . 206 ............................
Rear Seat Access . 82
..........................
Rear Seat, Folding . 83
............................
Rear View Mirror . 88
.................
Rear Window Def ogger . 70
....................
Rear Window Washer . 69
.......................
Rear Window Wiper . 69
...............
Reclining the Seat Backs . 81
.......
Recommended Shif t Speeds . 145
.............................
Reminder Lights . 57
Replacement Inf ormation
.................
Air Cleaner Element . 179
..........................
Engine Coolant . 173
................
Engine Oil and Filter . 169
..........................................
Fuses . 241
................................
Light Bulbs . 202
....................................
Schedule . 156
................................
Spark Plugs . 181
...........................................
Tires . 197
.............................
Wiper Blades . 186
Replacing Seat Belts Af ter a ............................................
Crash . 45
Reserve Tank, Engine
...............................
Coolant . 133, 171
...............................
Restraint, Child . 20
................................
Rotation, Tire . 196
Index
P R
O
VI